The deals are on hotels & packages, charter flights or pre-packaged vacations. The default page shows you Canadian travel deals, but you can also change that to either The Caribbean, Europe, Latin America or The USA, depending on where you fancy going to. Here's the description from the Expedia Canada page:

Looking for a local getaway or a global adventure? If your travel dates are flexible, take advantage of Expedia.ca's last-minute travel deals that span the globe. Look for Insiders’ Select hotels and resorts – the top properties on Expedia.ca as determined by our experts...and millions of customers just like you.

If you see a deal, I highly recommend price comparing it before you purchase, and also do a bit of research on your hotel with the likes of Tripadvisor.